| Delaware to Ridgeland (Mississippi) | 670.29 mi (1,078.72 km) |
| Delaware to Ridgewood (New Jersey) | 472.13 mi (759.83 km) |
| Delaware to Rifle (Colorado) | 1,305.76 mi (2,101.42 km) |
| Delaware to Rincon (Georgia) | 561.46 mi (903.58 km) |
| Delaware to Ringwood (New Jersey) | 464.23 mi (747.10 km) |
| Delaware to Río Grande (Puerto Rico) | 1,827.83 mi (2,941.60 km) |
| Delaware to Rio Grande City (Texas) | 1,318.47 mi (2,121.87 km) |
| Delaware to Rio Linda (California) | 2,032.89 mi (3,271.62 km) |
| Delaware to Rio Rancho (New Mexico) | 1,330.95 mi (2,141.95 km) |
| Delaware to Rio Rico (Arizona) | 1,667.66 mi (2,683.84 km) |
| Delaware to Ripon (California) | 2,034.95 mi (3,274.93 km) |
| Delaware to River Edge (New Jersey) | 475.81 mi (765.75 km) |
| Delaware to River Falls (Wisconsin) | 579.14 mi (932.04 km) |
| Delaware to River Forest (Illinois) | 270.94 mi (436.03 km) |
| Delaware to River Grove (Illinois) | 272.60 mi (438.70 km) |
